F# Console app (tried .NET 4.5 and 4.5.1). Chart seems to hang with Not Responding on Windows 8.1.

gistfile1.txt

open FSharp.Charting
open System

[<EntryPoint>]
let main argv = 
    printfn "%A" argv
    
    Chart.Line([ for x in 0 .. 10 -> x, x*x ]).ShowChart()
    Console.ReadLine() |> ignore
    0 // return an integer exit code

Changing ShowChart to

Chart.Line([ for x in 0 .. 10 -> x, x*x ]).SaveChartAs("Foo.png", ChartTypes.ChartImageFormat.Png)

doesn't hang, but results in an empty white rectangle.

You're blocking the message pump. Change ReadLine to System.Windows.Forms.Application.Run() Not sure why this is only happening on 8.1 for you though, I would expect this to fail on any Windows version.

It probably will...just happen to be running on Windows 8.1. Haven't tried other versions. Any idea how to terminate the app when using Run()? Launch on separate thread? Easier?

Also, SaveToImage() still gives empty rectangle :(

Hmmm...seems like you need to call ShowChart() before SaveChartAs() otherwise nothing gets rendered.

Please add a bug to http://fsharp.github.io/FSharp.Charting/ and if possible fix it as well :)

hack, but works

   use form = new Form(Width=400, Height=300, Visible=true, Text="Hello charting")
   Chart.Line([for x in 0 ..10 -> x, x+x]).ShowChart()
   System.Windows.Forms.Application.Run(form)